I need to fill in some holes in my dash from a stereo install that was removed. The holes are 1 & 3/4" in diameter and are perfectly circular.

I read the post ealier this month about fixing holes in your dash and I am going to follow that method.

I do have a concern about sticking a piece of wet fiberglass to the backside of the repair. The repair surface is much like a table top and the bottom backing piece will be fighting gravity wanting to fall off.

Any suggestion as to how I better insure the piece sticks long enough to make a bond and cure?

If you grind the surface good enuff ,,,,,it should not be a problem.
The fibers will hold it up .

You might try taking a piece of plywood covered with waxed plastic and press it in place after wet out. You could wedge somehthing against the plastic untill it hardens. Then repair the top side. Then remove the wood and plastic and finish the bottom. Even if the plastic sticks a bit you can grind off any excesss. My guess is that you will also need to let the resin stiffen up a bit before application. This will help make it stick the first time around.

Post some pics. It will be nice to see how you pull it off.

I may just tack it up there with a couple of 1/4" staples.

The area underneath is hidden from view and very accessible and about 1/2" thick. I'll just pop the staples out when it cures.

Anyone see any problems with this high tech method?

you shouldnt have to hold it up with anything, the key is proper amount of resin in the laminate. To much resin will make it difficult to stick.

Okay,

Can I use use my power drill and a 2" 36 grit sanding disc to scarf back the hole. The holes are not much bigger than two inches.

I know the drill will take a bit more time and it may be a bit harder to control.

Another idea I had was to use a chamfer bit in my router and then knock the sharp edges down with my drill.

The grinder I was looking ar requires 3.0 CFM and my compressor in only 4.6 @ 90PSI. Will my compressor keep up?

It doesent matter what u use ,,,,,make shure u put baby powder on any exposed skin and take a vacum with u and let it run next to the grinder ,,,,,gonna be IIIIIIITCHYYY. LOL

DONT FORGET TO WEAR A MASK !

Thanks for the help.

I may just stick to my router and drill set up. I am planning on using a strong vaccum to suck as I cut and sand.

Eye protection, vent mask, long sleve shirt & latex gloves...I'll take pics!!!!